Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1978-12-14
1981-07-21
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307448, 307270, 307454, H03K 301, H03K 1908
Patent
active
042800650
ABSTRACT:
This invention relates to a tri-state type driver circuit in which any one of the three possible output signals of "float", "on", or "off" is produced at high speed even when an output terminal is accompanied with a great load. The tri-state type driver circuit comprises an output inverter circuit which employs a bipolar transistor as a load thereof and a MOS-FET as a driver thereof, a first logical circuit which is coupled to an input terminal of the bipolar transistor, which first logical circuit is made up of a C-MOS circuit receiving an external select signal and a C-MOS circuit having an input signal transmitted thereto and whose output can be specified by the external select signal, and a second logical circuit which is coupled to an input terminal of the MOS-FET, which second logical circuit is made up of a C-MOS circuit receiving the external select signal and a C-MOS circuit having the input signal transmitted thereto. The state of the external select signal will determine whether the driver circuit output will be "float" (regardless of the input to the driver circuit) or "on" or "off" (in correspondence with the input to the driver circuit).
REFERENCES:
patent: 3832576 (1974-08-01), Proebing
patent: 3963946 (1976-06-01), Zajac
patent: 4176272 (1979-11-01), Power
Kubo Masaharu
Masuhara Toshiaki
Minato Osamu
Sasaki Toshio
Davis B. P.
Hitachi , Ltd.
Miller, Jr. Stanley D.
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